function setOverSrc(elem){
    elem.overStatePreload=new Image();
    elem.overStatePreload.src=elem.src.replace(/(_on)*(\.\w+)$/,'_on$2');
    elem.onmouseover=function(){this.src=this.src.replace(/(_on)*(\.\w+)$/,'_on$2')}
    elem.onmouseout=function(){this.src=this.src.replace(/(_on)+(\.\w+)$/,'$2')}
    elem.onload='';
}


 function getFilterString()
 {
   try
   {
      var query = window.location.search.substring(1);     
      if(query != null && query != "")             
         return "?" + query;
      else
         return "";    
   }
   catch(e)
   {
      return "";
   }
 }